Automated selection of optimal calibration in tracked interventional procedures

a technology of automatic selection and interventional procedures, applied in the field of device tracking instruments, can solve the problems of inaccurate electromagnetic to ultrasonic (em-us) fusion during the interventional procedure, inability to achieve the same fg position, and errors in therapy delivery

Active Publication Date: 2019-12-17
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Ensures accurate and robust placement of the EM field generator, independent of its position and orientation, thereby maintaining clinical acceptability and improving the accuracy of EM-US fusion, even under varying clinical conditions.

Problems solved by technology

Due to inter-patient size variation and other clinical factors, it may not be possible to achieve a same FG position and orientation in all clinical procedures as in a controlled setting during calibration.
This may result in inaccurate electromagnetic to ultrasonic (EM-US) fusion during the interventional procedure since validity of the calibration is dependent on treatment geometry.
If the position and orientation of the EM field generator (FG) with respect to the tracked EM sensors / tools is different from that during the calibration process, system performance will be sub-optimal and hence, there may be errors in therapy delivery.

Method used

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  • Automated selection of optimal calibration in tracked interventional procedures
  • Automated selection of optimal calibration in tracked interventional procedures
  • Automated selection of optimal calibration in tracked interventional procedures

Examples

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Embodiment Construction

[0015]In accordance with the present principles, systems and methods provide accurate and robust placement of a field generator (FG) that is insensitive to position and orientation to ensure clinical acceptability. In one embodiment, a system automatically chooses an optimal calibration from a pre-populated database of calibrations, based on the patient-specific treatment geometry. Methods for determining the optimal calibration are also provided.

[0016]In an offline (pre-treatment) procedure, multiple calibrations are computed and stored in a database, each at a different position and / or orientation of the FG. The database is extensively populated with calibrations for multiple clinically-achievable FG positions and orientations. Each calibration in the database is tagged with a position and orientation of a 6 degree-of-freedom (DOF) reference sensor with respect to the FG. The reference sensor is attached at a permanent static location (e.g., on a stepper, for prostate brachytherap...

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Abstract

A system for selecting a calibration includes a data structure (138) including non-transitory computer readable storage media having a plurality of calibration entries stored therein and indexed to position and / or orientation criteria for a field generator. The field generator is configured for placement in an environment for sensor tracking. A calibration selection module (140) is configured to determine a position and / or orientation of the field generator and, based on the position and / or orientation, determine, using the data structure, corresponding calibration information stored in the data structure. The calibration information is optimized based upon the position and / or orientation of the field generator.

Description

CROSS-REFERENCE TO PRIOR APPLICATIONS[0001]This application is the U.S. National Phase application under 35 U.S.C. § 371 of International Application Serial No. PCT / IB2015 / 059025, filed on Nov. 23, 2015, which claims the benefit of U.S. Application Ser. No. 62 / 090,579, filed on Dec. 11, 2014. These applications are hereby incorporated by reference herein.BACKGROUNDTechnical Field[0002]This disclosure relates to device tracking instruments and more particularly to systems and methods for determining an optimal calibration for a position of a field generator for a tracking system.Description of the Related Art[0003]In interventional procedures involving any form of electromagnetic (EM) navigation / guidance, an EM field generator (FG) is provided near an area of the procedure and, in particular, close to where the tracking takes place. This may include a tracked area of interest, such as, e.g., a groin area in the case of prostate brachytherapy. The FG is usually supported by a mounting...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): A61B5/06A61N5/10
CPCA61B5/062A61N5/1027A61N5/1075A61N5/1001A61N5/1049A61N2005/1022A61N2005/1051A61N2005/1058A61N2005/1074A61B2560/0223
InventorBHARAT, SHYAMRAVI, ANANTHDEHGHAN MARVAST, EHSANKUNG, CYNTHIA MING-FUKRUECKER, JOCHEN
OwnerKONINKLJIJKE PHILIPS NV